This set of buttons provide regional analysis of temporal sequences for the
extraction of quantitative parameters relating to voxel level perfusion of
tissue. It is intended to provide support for the ``net-flow'' approach
developed in our group (Tina memo 2001-003).

gamma fit fits a gamma variant to the timecourse at each pixel
location. The selected parameter choice option TTM, CBV, MTT, ERR, RCC
(time to mean, cerebral blood volume, mean transit time, residual error, or recirculation
contribution) determines which of these parametric descriptions of the data to push onto
the imcalc stack. The initital execution of gamma fit requires several
seconds of processor time. All parametric images reulting from that analysis
are subsequently available instantly upon selection with the choice menu.